With reference to the current trends in the cultivation of sugarcane in India, consider the following statements: 1. A substantial saving in seed material is made when 'bud chip settlings' are raised in a nursery and transplanted in the main field. 2. When direct planting of setts is done, the germination percentage is better with single-budded setts as compared to setts with many buds. 3. If bad weather conditions prevail when setts are directly planted, single-budded setts have better survival as compared to large setts. 4. Sugarcane can be cultivated using settlings prepared from tissue culture. Which of the statements given above is/are correct?
With reference to the current trends in the cultivation of sugarcane in India, consider the following statements: 1. A substantial saving in seed material is made when 'bud chip settlings' are raised in a nursery and transplanted in the main field. 2. When direct planting of setts is done, the germination percentage is better with single-budded setts as compared to setts with many buds. 3. If bad weather conditions prevail when setts are directly planted, single-budded setts have better survival as compared to large setts. 4. Sugarcane can be cultivated using settlings prepared from tissue culture. Which of the statements given above is/are correct? Correct Answer 1 and 4 only
The correct answer is 1 and 4 only.
Key Points
- Transplanting sugarcane single-bud/ bud-chip settlings can save seed cane requirement up to 80 percent besides providing healthy plants and good field establishment.
- It is less expensive and labour saving in comparison with conventional sett planting.
- Hence statement 1 is correct.
- When direct planting of setts is done, the germination percentage is better with many buds setts as compared to setts with single-budded.
- If bad weather conditions prevail when setts are directly planted, large setts have better survival as compared to single-budded ones.
- Hence statements 2 and 3 are not correct. Statements are reversed in question.
- Tissue culture or vegetative propagation can be used to germinate and grow these settlings which can be transplanted in the field later.
- Hence statement 4 is correct.
Important Points
- The conventional method of sugarcane planting requires 7 to 8 tonnes of seed cane per hectare and this is the main reason for slow rate of seed and varietal replacement.
- Sugarcane being a long duration crop and heavy biomass producer requires about 1500 to 2500 mm water.
- Keeping in mind the likely to be faced situations in future, the ICAR-Sugarcane Breeding Institute (ICAR-SBI).
- ICAR has developed an integrated sugarcane cultivation model called Settling Transplanting Technology (STT).
- Components of the model are listed below:
- High yielding and better quality varieties
- Raising and transplanting of settlings derived from single bud setts/ bud chips
- Sub-surface drip irrigation and fertigation
- Wider row planting
- Intercropping
- Trash mulching
- Multiple ratooning
- Mechanization
Additional Information
- Sugarcane is commercially planted using setts (cuttings which can develop roots) at the rate of 6-8 tonnes per hectare, amounting to around 10 per cent of the total production.
- This large mass of planting material creates logistical challenges in transportation and storage of seed cane.
- The tissue culture technique, owing to its cumbersome outfit and physical limitation, is turning out to be uneconomical.
- To reduce the mass and improve the quality of seed cane would be to plant excised axillary buds of canestalk, popularly known as budchips.
- These bud chips are less bulky, easily transportable and more economical seed material.
- A bud chip nursery can be raised in mini- plot near experimental field.
- Nutrients are sprayed with PGR (plant growth regulator) solution at 3rd week.
- Healthy settlings were transplanted in well prepared field after 4-5 weeks with row spacing of 90 cm and 30 cm between the two settling (small setts).
- Various research and experiment shows that, germination percentage of 3 bud sets is higher than the setts having more or less than three buds. Germination percentage of single bud sett is very low because of moisture loss from other cut end. Also if whole can stalk is planted without giving any cut, still germination percentage remain low as only top end will get germinate.
- Various researches found that large setts seeds have better survival as compared to single- budded seeds when seeds are directly planted in prevailing bad weather conditions.
- Planting is the most important and labour intensive operation in sugarcane cultivation.
- To rapidly produce and supply disease-free seed cane of existing commercial varieties Tissue culture is an exciting new way which uses meristem to clone the mother plant.
- Cane and sugar yield of tissue culture plants similar to conventionally propagated plants.